How does fluoride varnish application contribute to preventing caries in primary and transitional dentition?

• A. It tastes sweet and is used for flavoring
• B. It delivers high-concentration fluoride to enamel, enhances remineralization, and suppresses caries progression with minimal patient cooperation required
• C. It replaces brushing
• D. It causes tooth sensitivity

Answer: (B)

Fluoride varnish works by delivering a high concentration of fluoride directly to the enamel, creating a strong, localized reservoir that enhances remineralization and reduces enamel demineralization during acid attacks. In primary and transitional dentition, enamel is thinner and more porous, so this rapid, high-fluoride exposure helps subsurface lesions regain minerals and slows or stops caries progression. The varnish adheres to the teeth for a period after application, often requiring minimal cooperation from the child and no rinsing, which makes it particularly practical in pediatric patients. The approach isn’t about flavoring or replacing brushing; it’s an adjunct that strengthens enamel and helps prevent new decay. It also does not cause tooth sensitivity as a standard outcome.